Reason for Laboratory Test Screening
This test is not a specific lab result but rather a record of the clinical reason(s) why a laboratory test was ordered. It helps healthcare providers understand the context for testing.
["This is a documentation tool, not a diagnostic test itself."]
Key facts at a glance
- LOINC
- 33035-7
- Short code
- Reason for lab test Smn
- Synonyms
- Reason for lab test Smn
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Specimen volume
- 5 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 4–24 hours
- Order
- routine
What This Test Does
The 'Reason for Laboratory Test' entry logs the purpose behind ordering specific blood, urine, or other specimen tests. Providers use this information to tailor follow-up care based on the test’s intended use—such as monitoring a condition, diagnosing an illness, or guiding treatment decisions. It does not measure any substance or biological activity but serves as a reference for the clinical workflow.
Who Might Need This
This entry is typically created by healthcare providers when ordering tests for patients, regardless of the patient’s symptoms or diagnosis. It’s part of routine documentation in medical records to ensure continuity of care.
Common Uses in Healthcare
Providers use this information to: - Align test results with suspected diagnoses. - Adjust treatment plans based on test findings. - Track patient progress over time for chronic conditions. It’s not used to interpret results but to contextualize them.
How It Differs from Actual Test Results
Unlike lab tests that measure substances like glucose, cholesterol, or hormones, this entry is a textual note. It does not provide numeric values or reference ranges but simply documents the clinical rationale for testing.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Frequently asked questions
Why would my doctor record the reason for ordering a lab test?
Does this entry affect my test results?
Can I see the reason for my lab tests?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy